Luminaire



FIG. 1 is a front elevational view of the design,

FIG. 2 is a top view,

FIG. 3 is a side elevational view thereof, the reverse side being identical,

FIG. 4 is a bottom view thereof, and,

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a luminaire, substantially as shown and described. 